Aluminum containing precipitating agent for precious metals and

Details Aluminum containing precipitating agent for precious metals and Aluminum containing precipitating agent for precious metals and

1976-09-02

1978-05-30

Padgett, Benjamin R.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75107, 252188, C22B 300

Patent

active

040921549

ABSTRACT:
A precipitating agent for precipitating precious metals such as gold from aqueous cyanide solution of the precious metal ions includes aluminum powder and a reducing agent such as sodium hydrosulfite, sodium borohydride or hydrazine. The precipitating agent may also include an alkali metal carbonate, such as potassium carbonate, as an activator. The precipitating agent efficiently reduces the precious metal ions to elemental metal for recovery and also consumes a portion of the cyanide content, which is often high in such solutions.
The method of use includes adjusting the precious metals cyanide solution to a high pH, adding the precipitating agent with agitation, preferably in incremental portions of the amount required. The solution is allowed to stand to permit the precipitated metal to settle, and the metal is separated from the solution.

REFERENCES:
patent: 512046 (1894-01-01), Moldenhauer
patent: 1136872 (1915-04-01), Hamilton
patent: 1479542 (1924-01-01), Hirschkind
patent: 2516321 (1950-07-01), Hurd et al.
patent: 3271135 (1966-09-01), Davidoff
patent: 3271136 (1966-09-01), Davidoff
patent: 3669895 (1972-06-01), Shastri

Affiliated with

Also associated with

Rating

Aluminum containing precipitating agent for precious metals and does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Aluminum containing precipitating agent for precious metals and , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Aluminum containing precipitating agent for precious metals and will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-467474